Calculating machine



May 5, 1936. K. o. R. HENZELMANN y2,039,795

CALCULATING MACHINE Filed Jan. 31, 1933 10 Sheets-Sheet 1 May 5, 1936. K. o. R. HENZELMANN 2,039,795

CALCULATING MACHINE Filed Jan. s1, 193s 1o sheets-Sheet 2 @ym/wm:

May 5, 1936- K. o. R. I-iEJZEIJMbJNn 2,039,795

CALCULATING MACHINE Filed Jan. 51, 1933 10 Sheets-Sheet 3 K. O. R. HENZEEMANN CALCULATING MACHINE Filed Jan. 31, 1953 10 Sheets-Sheet 4 May 5,-1936- K. o. R. HENZELMANN 2,039,795

CALCULATING MACHINE Filed Jan. 51, 1953 10 Sheets-Sheet 5 CALCULATING MACHINE Filed Jan. s1, 1935 1o sheets-sheet 6 NJlll. lllll IIJ krlllallL May 5 1936- y K. yR. HENZELMNN 2,039,795

cALcuLATING MACHINE Filed Jan. 31. 1953` 10 Sheets-Sheet 7 1o sheets-met s May 5, 1936,. K. o. R. HENzl-:LMANN CALCULATI'NG MACHINE Fild Jaim. 31, 193:5

May 5, 1936. K. o. R. HENZELMANN CALCULATING MACHINE Filed Jan. 31, 1933 l0 Sheets-Sheet 9 SST 10 Sheets-Sheet 10' May 5, 1936. K. o. R. HENZELMANN CALCULATING MACHINE Filed Jan. 31, 1933 Patented May 5A, 1936 UNITED STATES v oALcULA'rxNG MACHINE xa'rl om Reinhold nenzelmmn, Giasnuae,

Application January 31, 1933, serai N0. 654,499 In Germany April 28, 1931 s claims. (ci. 295-219) My invention 'relates to calculating machines and is, adaptable to machines. of the type in which the multiplicand is set up on a key board and a crank is rotated in conformity with the multiplier and in which multiplicand slides and multiplier racks arev employed. I provide, in combination with the key-board, which is subdivided into key frames, a locking and shifting lever or similar member for each key frame which lever or member in one of its positions permits entrainment of the corresponding multiplicand slide, while in the other position it locks the entrained slides and at the same time operatively connects the keyboard to the racks of a multiplier control mechanism so that, upon the subsequent depression of a key, the multiplier racks are operated. In this manner it is possible to operate with a single keyboard on which the multiplicand and the multiplier are set up in succession.

Another advantage offered by thenew machine is that corrections can be made during each setting-up without having' to clear away all the characters already set up.

A special key which will be referred to as the "multiplier determining key is provided for operating the locking and shifting lever of the individual key frames. When this key is depressed, it brings 'a mechanism to act on the e locking and shifting levers by which these levers which in their initial position permit operation of the multiplicand slides, are moved into their second position. In this position of these` levers connection to the racks of the multiplier control mechanism .is effected. The keys which have been depressed, are locked in the usual manner and the multiplier determining key is operated whereby the keys are released after the multiplicand slides have been locked.

In the drawings afiixed to this specification and forming part thereof a machine embodying my h invention is illustrated diagrammatically by Way yof example.

In the drawings Fig. 1 is a plan view ofthe machine,

Fig. 2 is a section along the line AII--II-of'Fig. 1, drawn to a larger scale and showing the position of the various operative elements of one of the key frames in their normal or starting position, the locking and shift-ing lever being in position permitting entrainment of the multiplicand slides,

Figs. 2a and 2b are perspective showings of the same elements shown in Fig. 2 with partit'l broken away for better illustration,

Fig. 3 is aview similar to that of Fig. 2 showing one of the keys depressed 'and the multiplicand slide moved a corresponding distance to the left in the ligure,

Fig. 4 is a similar View showing the position of parts just after movement of the locking. and

Fig. 7 is a showing o1 the multiplier determining key and related parts, in position permitting 1 setting of the multiplicand, Y

Fig. 8 is a similar view of the multiplier determining key and related parts, in position for the setting -of the multiplier,

Figs. '1a and 8a are details on an enlarged scale showing the locking and shifting lever in its two operative positions, Fig. 8a. showing thepartsv in multiplier setting position,

Figs. 9 and 10 are sections on the line IX-IX in Fig. 1, drawn to a larger scale and showing two positions'of a key which will be referred to as the starting key,

Figs. 11, 12 and 13 are sections on the line XI-XI in Fig. 1, drawn to a larger scale and showing three positions of a key which will be referred to as the multiplicand determining key,

Fig. 14 is a perspective illustration of the driving mechanism of the machine, and

Fig. 15 is a detail of the multiplier control mechanism, drawn to a larger scale and taken on the sectional plane II--II in Fig. 1.

Referring now to the drawings, and i'lrst to Fig. 1, A is the frame or body of themachine, with windows Md for observation of the multiplicand, and dial wheels 38 (Figs. 2 to 6) below 40 lthe windows Md. 5I is a side plate at the left,

and 5|' is the corresponding side plate at the right, of frame A. B is the multiplier control mechanism, with windows Mr and multiplier control wheels 68, as shown for instance, in Fig. 2 4

at the right and C is the carriage with windows T for the result and windows RC for the revolution counter in its top plate I8.

I is the keyboard, with the usual keys 3. The keys are subdivided into nine key frames each with a top plate 2, an inspection hole l in the plate, and nine keys 3.

The multiplier control mechanism, with its top @plate 1 and the windows i in the top plate, is

arranged" in front oi the keyboard l. 'Arranged 55 raexavwitnvernlmtnmtnemweredge at convenient points on the keyboard are the usual operating keys. Y

KW Mme! One of the key frames whose rectangular top plates 2 appear in Fig. 1, will now be described, it being understood that al1 nine key frames of the keyboard are exactly alike.

Referring rst to Figs. 1 to 6, 2| are the bars of the nine keys 3 in the frame. Each key bar is guided in a hole of the top plate 2 at its upper end and at its lower end is equipped with a roller 23 engaging in a vertical slot oi a guiding plate 22 which extends downwards from the top plate 2. 24 is a lower setting bar whose front end is supported by a link 25 which is fulcrumed on the plate 22 and whose rear end is supported by another link 26, also fulcrumed on the plate 22. This link is a bell crank whose longer arm 21 functions as a dog for controlling an upper setting bar 23. This upper bar which is mounted to slide below rail 22a oi the guiding plate 22, is equipped with a pin 23 at its rear end and is under the action of a spring |30, which is attached to the upper setting bar 29 at |5| and to the plate 22 at |52. 'I'he upper setting bar 23 is also equipped with a multiplier shift lever 3| which is fulcrumed on it at 3|). The multiplier shift lever 3| is L-shaped, with n long and substantially horizontal arm and a short and substantially vertical arm. -The spring |33 causes the pin 23 to engage the longer arm 21 of the link 23 so as to return the setting bars 24, 23 to their initial positions.

54 is a. pawl whichis pivoted to the multiplier shift lever 3| near itsi'ront end at 53. I5 is a spring which connects the longer arm of the pawl 34 to the short vertical arm of the lever 3|, so that the shorter arm of the pawl is held against a pin 3|' on the horizontalarm of the multiplier shift lever. 54 is a cam atrthe front end of the pawl 54 and 34" is a slot at the rear end of the cam. i1 is a multiplier rack which is. mounted to slide in the frame A, one rack 51 being provided for each key frame in line with its pawl 54. Each rack has teeth 31' which engage in a pinion on the shaft oi a multiplier control wheel forming part of the multiplier control vmechanism B. I'he multiplier wheels 63 are inspected through the windows 8 in the plate 1, as described with reference to Fig. l. 65 is a pin at the rear end of the rack 61 which upon the return movement of the lever 3| and the pawl 54, under the action of the spring lil attached to the upper bar 29, bears on the cam 54' of the pawl, depressing the cam 54' and lifting the rear end of the pawl oil?Y the pin 3|', as shown in Fig. 4, until nally the parts assume the position illustrated in Fig. 5, the pawl 54 under the action of its spring IS engaging the pin 33 on the rack 31 by its slot 34".

Mumpueqnd slide is mounted below the top plate 2, and 35" is k an abutment for the front end oi.' the slide whose position below the top plate 2 is shown inFig. 2, 43 is a hook on the slide 35 to which vis connected a spring 33 which pulls the vertical front end c! the slide into engagement with its abutment 35"'. At the front end the slide has a of the slide. At its horizontal rear end it is equipped with a rack for meshing with a pinion 31 of multiplicand wheel 33 which is inspected through the window 4 in the top plate 2 (Fig. 2). 36' is a claw at the rear end o1' the slide which cooperates with the usual selector gear 35.

Locking and shifting lever 35' (Figs. 2a and 2b) is a iixed block on which a locking and shifting lever 33 is fulcrumed at 34. The locking and shifting lever 33 has a slot 33' for a. pin 32 on the short vertical arm of the lever 3| to engage in.l 42 (Fig. 2a) is a double-armed coupling lever, which is iuicrumed on to plate 355 oi the slide 35 at 4I and 43 is a spring on the slide 35 which engages the rear end of the double-armed lever 42. 44 is a pin at the iront end of the double-armed coupling lever which, under the pressure of the spring 43, bears on the shouldered upper edge 33a (Fig. 2b) of the lever 33. Below the pin 44, the front end of the doubleearmed coupling lever 42 is equipped .with a. projection 42' which is adapted to engage a lug 29 on the upper setting bar 25.

A45 (Fig. 2) is the usual serrated locking bar for holding depressed keys 3 in their depressed position. 41 is a spring catch which is fulcrumed in the key frame at 45 near the front end ofthe key frame, and 48 is a spring which engages the front end of the spring catch. 41' is a tooth at the rear end of the spring catch whichengages the teeth of the rack 35" under the pressure o1' the spring 43. 41" is a pin below the tooth 41' which engages in a vertical slot 35" of the lever 33 (Fig. 217)..

Setting up multiplicand and, multiplier When one of the keys, for instance, the 5" key, Fig. 3, is depressed and arrested by the locking bar 45, its roller 23 bears on the upperV edge of the lower setting bar 24 and depresses this bar, rocking the link 25, 25 and the dog 21. The dog 21 moves the upper setting bar 23 to the rear by its pin 2B. At the same time, the lug 29' of the upper bar 29 engages the projection 42 of the double-armed coupling lever 42, so that the multiplicand slide 35 is moved to the rear by the cooperation of the lug and the double-armed coupling lever and shifts the selector gear 3E to the rear for a corresponding distance.

The multipllcand and the multiplier are set up by depressing the keys 3. In order to effect this it is necessary that the key 3 which has been de- 'has been locked by the bar 45, should be released while maintaining the selector gear 35 in the position to which it has been moved by the depres sion of the key. The release of the depressed key is effected by the multiplier determining key i3 which will now be -described with reference to Figs. 7, 8, 9 and 10. The key l5 which, as shown in Fig. 1, is marked with the sign "mr". is secured at the upper end of a crooked bar 43. Thebar is fulcrumed to the left side wall 5| of the casing A at 50, and positioned at the left or outer side o! the wall 5|. 52 is a spring which is anchored on the wall 5| at 5| and holds the key bar 43 against a check 5I". 49 is a roller on the bar 43 of the key l5 which bears on an arm 53. This arm is secured on a shaft 54 which, as shown in dotted lines in Fig. 1, extends transversely of the machine in front of its keyboard and is journaled in the side wall 5| at the left and in the corresponding side wall 5|' at the right. 43" is a downwardly extending mojecion at the rear end of the bar 49 which bears on a pin 55. This pin which projects through a slot in the left side walls i, is secured on a doublearmed lever 51 which is fulcrumed on the inner side of the side wall 5i at 56. The upper end of the double-armed lever has a pin 51' which engages in the slotted iront end of a connecting rod 58, with a pull back spring 58', whose rear end is fulcrumed to a rocking lever 59 at 59. The rocking lever 59 is mounted on a shaft 59 which extends in parallel to the shaft 54 at the rear of the keyboard and is journaled in the two side walls at its ends, its position being shown in dotted lines in Fig. 1.

By depressing the multiplier determining key I6, it is movedrom the position shown in dotted lines in Fig. 8 into the position shown in full lines, against its pull-back spring 52. 'I'he shafts 54 and 60 are rotated clockwise in their bearings upon the depression of the key I6, through the mechanism which hasbeen described. The shaft 54 is equipped with a radial pin 6I for each key frame. Each pin is adapted to engage a hole in an extension 35"' at the front endl of the correspending locking and shifting lever 33, as best seen in Fig. 2b. Similar pins 62 are provided on the shaft 60 which extends in parallel to the shaft 54 at the rear of the keyboard. Each pin 62 is adapted to cooperate with the corresponding locking bar 45, as best seen in Fig.' 3. When the shafts 54 and GU are rotated clockwise by depressing the key i6, Fig. 8, the locking and shifting levers 33 of all keyboards are raised by the pins 6I on the shaft 54 engaging in the holes of their extensions' 33" and at the same time the locking bars 45 are moved in forward direction by the pins 62 on the shaft 60. The locking bar 45 now releases the 5 key which had been depressed so that the key returns into its initial position. The pin 41" at the rear end of the spring catch 41 (Fig. 2b) serves for holding the multiplicand slide 35 and its selector gear 36in the position to which they had been moved by the depression of the 5 key. The pin 41", as described, projects 'into the vertical slot 33" -of the locking and shifting lever 33. `The locking and shifting levers 33 are held in raised position by locking the shaft 54, as will be described below with reference to Figs. 1l, l2 and 13. When the levers 33 have been raised by the pins 5las shown in Fig; 5, the` lower end of each vertical slot 33" engages the corresponding pin 41" and holds the tooth 41 at therear end of the catch 41 engaged with the rack 35" at the front end of each multiplicand slide. Those multiplicand'slides 35 which have been moved to the rear in the individual key frames now locked, andso are their selector gears 35. As mentioned, the 5 key which had been depressed, is released by the locking bar 45 and returns to its initial position. In this manner, operation of the key i8 causes the keys 3 to return to their initial positions so that the keyboard is cleared.

Those multiplicand slides 35 which have been retained by the corresponding teeth 41' in the individual frames remain locked for the present while the springs 159 (Fig. 2) through the medium of the pins 28 on the upper setting bars 29 return the upper and lower bars 29 and 24, together with their links 25 and 26, 21 into initial position. The coupling levers 42 on the multiplicand slides 35 are 4raised by -the raising of the levers 33 to which they are-connected by their pins 44, so that the projections 42' on the coupling levers' 42 move clear of the lugs setting up the multiplier. The means for setting up the multiplicandv includey the multiplicand slides 35, and the means for setting up the mul--v tiplier include the racks 51.

Referring now to Figs. 'Ia and 8a, Fig. 7a shows l the initial positions of the multiplier shift lever 3l and the locking and shifting lever 33. This position of the levers corresponds to the initial, i. e. undepressed, position of the multiplier determining key i5. The levers 3| and 33 are both in their lowermost position, the projection 42' on the coupling lever 42 is in cooperative relation with respect to the lug 29 on the upper setting bar 29 and the bar 29 entrains the multiplicand slide 35 through the medium of the lug 29' and the coupling lever 42. This permits -setting up the multiplicand by depression of keys 3. The `multiplier shift lever 3i is also in its lowermost position so that the slot 54" in the pawl 64 clears the pin 66 on the rack 51. VWhen. on the other hand, the key I 6 is depressed as shown in Fig. 8, the multiplier leverl and the locking and shifting lever Vare raised together as shown in Fig. 8a, and the pro- Jection42' of the coupling lever 42 is moved clear of the lug 29' on the upper bar 29 so that the multiplicand slide 35 is not entrained. At the same time, the pawl 54 on the lever 3i engages the pin 6B on'the rack 51. In this position of the key I6, the multiplier can be set up.

The means `for locking the shaft 54 in the positionin which the levers 3i and 33 are raised for setting up the multiplier after the key I6 has been depressed, as shown in Figs. 8 and 8a, will now be described with reference to Figs. 11, l2 and 13. '92 is a. lever on the shaft 54 whose position in the frame A is indicated in dotted lines at the right in Fig.'1. 92 is a. pin atthe free end of the'locking arm 92 which is adapted to be engaged by a shoulder 93' on a pawl 93. The pawl 93 is equipped with a pull-back spring 93" and vis mounted .to rock about a pin 94 so that the shaft 54 is held in position against the action of thespring 53' at the end of the arm 5.3, Figs. 'I and 8.

When, whileithe shaft 54 is locked against 4rotation in the manner described, the multiplierV by depression of a key, such as the 5 key, are

is set up by depressing the corresponding keys 3', as shown for the 3 key in Fig. 6, the keys in the several key framesoperate the correspending lower bars 24 and the multiplier racks 61 in the'manner described, while the multiplicand slides 35 and the parts connected to them are not influenced, being retained by the catches 41 engaging racks 35". The locking and shifting levers 33 are held in their raised position, as bestseenin Figs. 8a, and being raised, connect 'the pawls 54 to the pins 56 on the racks 61 so that upon the depression of a key 3 the corresponding multiplier wheel 68 inthe multiplier control mechanism 'B is rotated and displays the numeral of the key in its inspection window 8. Upon .depression of the 3 key as in Fig. 6, the numeral 3 will appear in that inspection window which is alloted to the key frame where the key has been depressed.

The multiplication is now performed by starting the machine through the medium of the starting key I1, which is marked with the sign S.

Operation of multiplier control mechanism Referring now to Figs. 9 and 10, the horseshoe shaped bar 5I of the starting key I1 is fulcrumed on the inner side of the left side wall 5| at 1I II is a spring which holds the keybaragainst acheckI1. 1| is a dog onthe bar 99 of the starting key |1 which is adapted to be engaged by a notch 12' in a lever 12. 'Ihe lever 12 ls fulcrumed on the side wall 5I at 13 and is equipped with a spring 14 which tends to pull it in forward direction. 1l is a pin on the lever 12 which engages in a slot 1I' of a link 19. The other end of the link is pivoted to a lever 11 on a shaft 1I which extends along the multiplierV control mechanism B in front of the multiplier wheels II and in parallel to the shaft I4. The position of the shaft 1I is best seen ing Fig. 14. The same shaft 1I supports a feeler 19 for each multiplier wheel. II is a locking plate on each multiplier wheel, with a recess Iii'. The feelers 19 are equipped with pins 19 for cooperation with the locking plate Iii. The feelers 19 are operated by conventional means which form no part of the present invention. For example, they may be controlled by cams |83 (Figs. 9 and 10) on a shaft I2I which forms part-of the driving mechanism of the machine and will be described below. The cams III, which rotate 'in the direction of the arrow Fig. 9 with the shaft |2I, cooperate with cam levers III which operate the feelers 1I and are held against the corresponding cam III by springs |95. The rotation of the shaft |2I is so timed with respect to that of the driving shaft of the machine, (as

will be described below) that the feelers 19 are releasedand moved toward the corresponding,

locking plate in the direction of the arrow in Fig. 9 under the action of their springs |85 once with a roller II' at its free end. A link II is pivoted to the upper end of lever II at 8l" and is equipped with a spring Il which pulls the link to the left so as to hold the roller II' Mainst the lower edge of the key bar II. When the starting key I1 is depressed the lowerV edge of the key bar 99 forces the roller II'V and lever II to the right as shown in Fig. 10. This alsopulls link II to the right: The other end of link .II is connected to a device for cutting in a motor (not shown) which starts rotation of shaft |32. This motor lstarting device may be similar to that shown in German Patent No. 457,825, Fig. 2, for example. I9' is a cam on the key bar 5I, of the starting key I1. 'Ihe cam bears on the double-armed lever l1 which has already been described with reference to Figs. 'Il and 8. While the multiplier determining vkey II clears the multiplicand set up in the manner described above, the starting key I1 clears the multiplier set up. II is a link which is pivoted to the lower end of `the lever at 51". The link II is operatively connected to a mechanism for feeding the carriage of the machine by connecting it to the drivel shaft |32. This of the shaft I2|| with a tonguel |2I'.

sleeves move with the bridge |23 as it slides alom in its undepressed position, the pin I9 is in its lowermost position as indicated indotted lines 'in Fig. 9 so that the starting key I1 is locked against operation.y while the key I5 is not depressed. This prevents untimely operation of the two keys I5 and I1 which, as shown in Fig. l, are arranged side by side and might be confused by the operator. When the key II has been de pressed as shown in full lines in Fig. 8, the shaft 54 is rotated and the pin I9 is moved into the full-lines position shown in Figs. 9\and 10 so that the starting key |1 is now free to be operated. The starting key, by the cam I9' (Figs. 9 and 10) on its key bar.;59, acts on the double-armed lever 51 in the same manner as the multiplier determining key IB acts through itsprojection II". This action rotates shaft II in a clockwise direction through a small angle (Fig. 8) which results in releasing the keys which have been de'1ressed for setting up the multiplier.

iin, Fig. 14, is a rack on the carriage C which meshes with a pinion ona shaft |I2. 'Ihis shaft ||,2 extends in the longitudinal direction of the machine in parallel to its left side wall II. The ends of the shaft |I2 are supported in suitable bearlngs (not shown). III is a bevel pinion on the front end of the carriage shaft .'I2, III isa bevel pinion on a 'vertical shaft III which meshes with the'bevel pinion III on the carriage shaft, and IIB is a sprocket at the lower end of -the vertical 'shaft Ill, shown in Figs. 14 and i5.

IIB (Fig. 14) is a corresponding sprocket at the right of the machine and I 1 is a chain traveling on the sprockets which is secured to an extension |23 (Fig. 15) of a bridge |29 forming part of the multiplier control mechanism as will be described below. The bridge |23 is mounted to slide along the cam shaft |2I, (Fig. 15) and a shaft Ils which extends 1n parauel relation to the cam shaft. Both shafts, which are spllned,

extend also in parallel relation to the shaft 1I on which the feelers 19 are mounted. One of the feelers is shown in Fig. 14.

When the carriage II moves, the shaft I|2 is rotated through the rack III and the pinion II. and by its rotation the bridge |23 is moved along the shafts H9, |2I through the medium of bevel gearing III, III, shaft III, sprockets III, III and chain II1. By this means the relative positions of the carriage II and the bridge |12 are maintained fixed. I2| is a sleeve which engages in the spline of the shaft III with a. tongue III' and |22 is a sleeve which engages in the spline The two the shafts H9 and I2I. '111e bridge is divided and its lower portion is equipped with the extension |23. The sleeve |2| on the shaftIII is equipped with an arm I2 I', with aroller |24 at its free end, and |22' is a tooth or cam on the sleeve |22 which is adapted to engage in the star wheels |25 of the dial wheels 6I.

Multiplier drilpe m (Fig. 14) is a shaft which eneg in pmuaosavos lel to the left side wall 5|, |21 is a pair of bevel gears which connect the shafts |28 and |28, and |29 is 'a clutch of any suitable type on the front end of the shaft |28, with a bell-crank 90 for operating it, by which the shaft can be connected to a bevel pinion |30 which is normally free to rotate on the shaft and meshes with a bevel pinion |3| on the shaft |20 on which the sleeve |22 is splined. Clutch |29 may be designed, if desired, in a manner similar to the clutch shown in German Patent No. 457,825, Figs. 'l and 8, the bellcrank 90 of my Fig. 14 performing the same function as the element 2| of the German patent. |33 is a cam on the driving shaft |32, (Fig. 14) andA |34 is a rocking lever which is fulcrumed in the frame of the machine at |35 and is equipped with a pull-back spring |36. |34" is a pin at the upper end of the rocking lever |34 which is operated by the cam |33 so that the lever |34 is rocked once for each revolution of the driving shaft |32. |31 is a link which is pivoted to the rocking lever |34 at |34' and is supported on the slotted guide |38. |39 is a pin on the bar 69 of the starting key |1 (Fig. 14) which is adapted to cooperate with the shorter arm of a double-armed lever |40 fulcrumed at |40' on side wall 5|. The longer arm of the lever engages below a pin |4| on the link |31.

arm of the lever |40 raises the link |31. The plate |43 which is supported by a pin |46 has a slot |43 at its lower end and is connected to a spring |46 which pulls the lower end of the plate |43 in forward direction until the end of the slot |43" bears on a pin |46. |44 is a connecting rod by which the pin |43' on the upper end of the plate |43 is connected to a crank |45 on the splined shaft ||9 which bears the sleeve |2|, Fig. 15.

|41 is a second pin on the lower end of the plate |43 which is engaged by a cam |48 on the shaft |49 by which the feed of the carriage C is released upon rocking of the lower part of plate |43. The means by which this is effected do not form part of the present invention and are not illustrated;

|50, Fig. 15, are double-armed levers, one for each dial wheel 68, which are fulcrumed at |5| and are each equipped with a spring |52 holding it against a check |53. The lower end of each lever |50 projects into the path of the roller |24 on the sleeve |2|. The upper end of each lever cooperates with a lug |54 at the side of the corresponding plate 80. The lugs |54 are so positioned that they face the end of the lever |50 when the recess 80' of the locking plate is in position to be engaged by the pin 19' on the feeler 19. In this position of the dial wheel, the numeral appears in the corresponding inspection opening 8. l I

Operation of machine When the starting key I1 is depressed as shown in Fig. 10, it is held down by the lever 12 engaging the dog 1| on the bar 89 with its notch 12'. The double-armed lever 51 has been rocked about its fulcrum 56 by the cam 69 and the link 58, through the medium of the lever 59, the shaft 60 and the pin 62, clears the multiplier from the keyboard. At the same time, the link 85 operates upon a carriage reversing means (notashown) in such manner that the carriage is moved to the right, correspondingto multiplication. Upon depression of the starting key the rod 83 is pulled to the right in Fig. 9, by the action of roller 8| |31 is a notch in the link |31 which engages a pin |42 on a plate |43 when the longer and lever 8|. Rod 83, through mechanism which may be similar to that shown in German Patent No. 451,825, Fig. 2, cuts inthe motor and startsv rotation of shaft |32.

The bellcrank lever-90 of clutch |29, Fig. 14. is fulcrumed to the frame of the machine, its horizontal arm extending into operative relation to a y recess 69 in bar 69, as shown in Figs. 9 and 10. The vertical arm of the bellcrank lever controls the clutch |29 by which the bevel pinion |30 is connected to the shaft |28. Depression of the starting key |1 causes the bellcrank lever 90 to throw in the clutch |29 and to operatively connect the pinion |30 to the shaft |26 to which the shaft |28 is permanently connected by the bevel pinions |21. When the shaft |26 is rotated this, in turn, rotates the shaft |20. Once per revolution of the shaft |20 the tooth |22' (Fig. 15) of its sleeve |22 engages in the star wheel |25 of the corresponding dial wheel 88, turning the dial wheel back one digit per tooth. This is repeated until the numeral 0 appears in theinspection hole 8. In this position, as shown in Fig. 15, the lug |54 is opposite the upper end' of the doublearmed lever |50.

Depression of the starting key I1, (Figs. 9, and 14) causes, through the medium of the pin |39, (Fig. 14) the double-armed lever |40 andthe pin |4| on the link |31, the linkV to be connected to the plate |43 by the recess |31' in the link engaging the pin |42 on the plate |43. The reciprocating movement imparted to the link |31 causes the plate |43 to rock about the pin |48 in its slot |43" once for each revolution of the driving shaft |32. The rocking movement is transmitted to the shaft ||9 through pin |43', connecting rod |44 and crank |45. The consequence is that the'upper end of the lever |50 (Fig.'15) is moved in forward direction, through the medium of the roller '|24 on the arm |2|' of the sleeve |2|, which movesvin the direction of the arrow in Fig. 15. The lever |50 is free to perform its rocking movement againsty the action of spring |52 unless the lug |54 is opposite the upper end of the lever .corresponding to the zero position illustrated in Fig. 15. In the latter event the motion described is blocked and the pin |43' (Fig. 14) on the plate |43 then becomes a fixed pivot about which the plate is rocked by the link |31 against the action of its spring |46', this being permitted by the slot |43" in the lower end of the plate |43. The rocking movement of the plate about the pin |43 is transmittedto the cam |48 (Fig. 14) on the shaft |49 by the pin |41. The shaft |49, through means not shown, now connects the carriagefeeding means to the driving shaft |32 while at the same time the shaft4|26 is disconnected from the driving shaft |32. VThe carriage is now fed to the right for a single order. Obviously, the shaft |28 (Fig. 14) and the shaft |20 to which it is connected by the bevel pinion 30, 3|, are also arrested during the feeding movement of the carriage.

- 'I'he carriage, through rack H0, (Fig. 14) pinion shaft ||2, bevel pinions ||3, ||4 and shaft ||5, is connected to the sprocket I6 on which the chain ||1 is carried as described above so that the chain ||1 and the bridge |23 are fed ythrough a corresponding distance during the feeding movement of the carriage. Consequently the sleeve |2| and |22 are shifted a single order, in relation to multiplier wheels 68, for each single order shift of the carriage, and the members |24 and |22 (Fig. 15) of the sleeves |2| and |22 are placed in active relation with respect to the coracheck 98 by aspring Il.

f11lcrumedtothekeybarllatll,and|ll isa` responding members of the next following multiplier wheel Il. 'Ihe starwheel |25 of this next dial wheel is now rotated by the tooth |22 unless the parts are blocked by the lug |54 inthe aero position of the dial wheel. At the same time, the feelers 'Il are rocked in the direction of the arrow, Fig. 9. once per revolution of the driving shaft |22, and if all dial wheels Il are in zero position, with "0 appealing in the inspection holes l, and the pins 'Il' at the free ends of the feelers are opposite to the recesses III' and arefree to move tothe rear into the positon shown in dotted lines in Fig. 10. When all the dial wheels are in aeroposition thearmll whichis securedonthe shaft 1I of the feelers, moves the link 'Il to the rear and pushes the lever I2 awayfromthe dog 'l.|`

on the key bar tl, (as shown in dotted lines in Fig. 10. It is thus seen that, during operation of the machine, when the is being moved, the bridge |22 (Fig. 14) is also moving and at this time the sleeve |22 (Fig. 16) with tooth |22' is idle. But when the carriage stops to conduct a transfer operation, the bridge |22 is stopped beneath one of the multiplier wheels Il and the` sleeve |22 with its tooth |22' rotates, being driven through gears III, ISI, clutch |20, shaft |28, gears |21 and shaft |23.

Obviously the length of the slot Il the link Il must be so determined'that the bar catch 'I2' is not operated during the normal operation of the feelers 'I'. Only when recesses lll' are oppositeihe pins 18 at the free end of the feelers 1I, the bar catch 12 is means 1l.

'Ihekeybarisnowreleasedandthekey l1 is returned to its initial position, Fig'. 9, by the spring Il. 'I'hls causes the motor-switching rod Il, and into their initial positions. so that the machine is now arrested. Obviously, the lever B1, (Fig. 9) with the links il and Il which are connected to it, also returns into its initial position. The multiplicationis no'w completed and the result is read in the usual manner the windows T.

If it is desired to clear the multiplier from the keyboard `before the machine is started by depressing the key I1. the multiplicand determining key It at the right of the machine is operated. see Figs.`1l,l2and1 3. Thiskeyismarkedmdin Fig. l. 'lhe key baril of key IU, Figs. 11, 12 and 13, ls fulcrumed about apin I8 and is held against |00 is apawl whlchis Spring which tends to rotate the pawl III antlclcckwise. In the position illustrated in Fig. 11. the pointed end lll' of the pawl ill is depressed bytnepmn' atthefreeenaofthemckmglever 02 on the shaft,

li (Flgs.gl1, l2 and 13) is a pin on a downwardextensionofthekeybarllwhichengages in the slotted front end III' of a link II2 whose rear end is pivotally connected at Ill toa lever III on the shaft Il.

By depressing the multiplier determining key Il, (Figs.7and 8) thelever ll'ontheshaft I4 and the pawl 83 move in the positions illustrated in Fig. l2, as described above. At the same time the pointed end Ill' of the pawl I" engages a dog on the pawl 93. When the multiplicand de, termining key Il is depressed into the position lhowninfulllinesinll'ig. 13,thepin Il' onthe downward extension ofthe bar Il pulls the link Illtotherearandthelhaftllisrtatedln tbemannerdeocdbdcaudngitspinstooperate (Fig. 9) in' pushed back by thel the bell-crank lever ll, Fig. 14, to return the locking bars 45 (Fig. 2) and to release all keys 3 of the keyboard, permitting them to return into their initial positions. When the key Il is depressed, the hook |00' of the pawl Ill engages behind the dog 93".l When the key is released. the bar l5, under the action of its spring 81, returns into its initial position and entrains the pawl Il Y through the medium of the pawl III), rocking it to the rear. In this manner, the shoulder Il' which supports the pin 92 at the end of the lever J$2 on the shaft 54, is withdrawn, permitting the lever 92 to return into the position illustrated in Fig. 11. 'Ihe pawl |00 is engaged at its hook III' and the pin I2' and moved into the position illustrated in Fig. l1. At the same time the pins Il on the shaft 54 move into the position illustrated in Fig. 2 and the settinglever 32 moves into the corresponding position, as described. In this position of the parts the machine is in its s v position ready for the setting up of a multiplicand.

Example of multiplication The operation of the machine will'be best understood from the following example:

Multiply 56 by "348. Set up the multiplicand by depressing the "6" key I in the key frame at the right-hand end of the keyboard, and the "l key '3 in the frame at the left of this frame. Depression of the keys, through the means described, in connection with Figs. 2, 2a and 2b, i. e., lower bar 24, dog 21, upper bar 2l, lug 29' and double-armed coupling lever 42, causes the multiplicand slides in the two key frames to be shifted and the selector gears JI to be adjusted. 'Ihe characters 5" and 6 of the multiplicand 56 now appear in the inspection windows Md of the two key frames.

The multiplier determining key I8 (Fig. 9) is now depressed. This causes partial rotation of the shaft 54 in the manner described, and raising of the locking and shifting levers 3l (Fig. 2b) in all key frames. Raising of these levers permits the catches 41 to lock the slides 2l as the pin 41 are set -free by the slots 3l" of the setting levers. The teeth 41' of the catches 41 now retain the slides which have been displaced. by engaging in their racks 25". At the same time, through the medium oi' the link 5I (Fig. '1) and the shaft 80, with its pins 62, the keys which have been depressed, are released by the locking bars 45 (Fig. 2) clearing the keyboard but not influencingthe multiplicand slides 25 which are locked by the catches 41 in the manner described against the pull of the springs ll. The keys which have been depressed, return to their ini- ,f 'tial positions while the setting wheels It of the first two` key frames from the right remain in the positions to which they have been moved by the depressed keys. v

The multiplier shift levers 3| have been raised at the same time as the locking and shifting levers 33. 'Ihe pawls 64 (Fig. 7a) on the levers ll are raised with the levers so that upon the returnof the bar 22 to the right the slots 84" move into reach of the pins 6I on the racks 01. When the upper bars 29 of the two frames where keys have been depressed, return, the cams I4' of their pawls 64 engage below the pins II whereupon finally the pawls are connected to the racks 61.

The upper bars 29 of the two key frames in which keys have been operated, are now connected to the racks 61.

l board by means of the keys 3. The upper bar 29 in the key frame at' the right-hand end of the keyboard displaces the corresponding rack 61 until the character 8" appears in the inspection opening 8 of this keyboard, and similarly the upper bars 29 of the next two key frames operate their racks 61 to show 3 and 4 in the inspection windows 8. The starting key l1 (Fig. 9) is now operated to start the machine, as described. Depression of the starting key causes its recess 69 to operate the bell-crank 90 (Fig. 14) which in turn throws in the clutch |29. The cam 69 on the bar |59` operates the double-armed lever 51 and, through the link 58 and the shaft 60, clears the multiplier set up.. The clutch |29 connects the shaft |26 to th'e shaft |20 (Fig-15) with the sleeve |22 having the tooth |22'. By means of the rod 83, the motor is started and the shaft |20 rotates. The tooth |22 first cooper-i ates with the star Wheel |25 at the extreme right. The dial wheel 68 of this star Wheel isY at 8 and so the shaft |20 must perform eight revolutions until the lug |54 (Fig. 15) is in line with the double-armed lever and 0 appears in the inspection opening 8.l The multiplicand 56 has now been multiplied by eight and the numeral 448 is read in the windows T. The doublef armed lever |50 is now prevented from moving by the lug |54 and the drive acts on thel carriage feed, as described. After the carriage has been shifted one order to the right the tooth |22' has moved into line with the second star wheel |25 Whose dial wheel 68 is at 4. The operation is now repeated, the shaft 20 performing four revolutions until the corresponding lug |54 has blocked the double-armed lever |50. The numeral 56 is thus multiplied by forty. The consequence is that 2240 is added to 448" and- 2688 is read at T. At the same time, the carriage C has been shifted another order moving the tooth |22" in line with the third star wheel |25 whose dialwheel shows 3. vAfter three revolutions of the shaft |20 the last dial wheel is at 0. 'I'his means that the numeral 56. has further been multiplied by three hundred so that 16800 is added to the numeral in the windows T, making the result 19488,

As all dial wheels 68 are now at 0, all Ieelers 19 engage in the recesses 80' of the locking plate by which means the machine is arrested in the manner described.

I Wish it to be understood that I do not desire to be limited to the exact details of construction shown and described for obvious modications will occur to the person skilled in the art.

I claim:

1. In a calculatingmachine, in combination, a keyboard with keys capable of being set, setting means differentially actuable by said keys, multiplicand slides, multiplier racks and a locking and shifting means capable of being set in two positions; said locking and shifting means being adapted, when in one position, to cause entrainment of said multiplicand slides by said setting means and when in the other position being adapted to lock said multiplicand slides and to operatively connect said multiplier racks to said setting means.

2. The device of claim 1 wherein a key is provided for operating said locking and shifting means. i

3. The device of claim 1 wherein said locking and shifting means comprises a pivoted lever.

4. In a calculating machine, in combination, a. keyboard with keys capable of being set, multiplicand slides and multiplier racks, setting means diierentially actuable by said keys and shifting means capable of being set in two positions for operatively and selectively connecting said setting means either to said multiplicand slides or to said multiplier racks.

5. The apparatus of-claim 4 wherein said shifting means comprises slidable bars with stops for entraining said multiplicand slides and pawls for engaging said multiplier racks.

6. The apparatus of claim 4 wherein means are mounted on said shifting means for lockingv said multiplicand slides when said shifting means is in one of said two positions.

KARL OTIO REINHOLD HENZELMANN. 

